Inking apparatus of printing machines



0a. 15, 1929. H, D, B ACK 1,732,078

INKING APPARATUS OF PRINTING MACHINES Original Filed Nov. 26, 1927 IIL.II

Patented 0a. 15, 1929 UNITED STATES PATENT OFFICE HOB-ACE DBUHIONDBLACK, 0] LONDON, ENGLAND, ABSIGNOR TO THE BELL PUNCI & PRINTING CO.LEI-1)., OF UXBRIDGE, HIDDLEBEX, ENGLAND INKING APPARATUS OF'PBINTINGMACHINES Original application filed November 28, 1921, Serial No.885,877, and in Great Britain December 10, 1828. Divided and thisapplication filed October 24, 1928. Serial No. 814,816.

This invention relates to the inking apparatus of printing machines suchas combined ticket rintin and issuing machines of the kind escribet l inthe specification of my application for a patent, Serial No.

235,877 of which this case is a division, in

which the inking roller and the ink-duct roller, the former being formedof, or coated with, the usual resilient composition and both being ofcomparatively short length, are arranged in such a manner that thecontact obliquely with one another, the e fect of this oblique contactgiving to the inking roller a somewhat similar ink dis tribution to thatobtained with the lateral oscillating roller in the ordinary form ofinking train.

In my said specification the inking roller is carried on a pivot beneaththe fixed revolving ink duct roller, the consequent pivoting movement ofthe said inking roller to bring it into contact with the platen orprinting cylinder being controlled by a cam, secured to the shaft of thesaid platen or printing cylinder, and rotating therewith, which operatesone end of a bell-crank lever, the free end of the inking roller shaftbeing carried in a slot provided in the other end of the said bell-cranklever.

According to the present invention, the movement of the inkmg roller isa parallel one between the ink-duct roller and the printing cylinder sothat it can be moved out of contact with the one and into contact withthe other, the stationary ink-duct and its revolving roller beingmounted obliquely relatively to the said inking roller, the inkingroller being moved through the medium of bell-crank levers by camsconnected to the printing cylinder.

In order that the invention may be fully understood, I will now describeit by reference to the accompanying drawing, in which Figure 1 is asectional elevation illustrating the improvements in accordance with theinvention.

Figure 2 is a plan view thereof.

a is the ink-duct roller, revolving on its spindle b, and c is theink-duct an which together are mounted obliquely to the horizontal. d isthe inkin roller which revolves on the spindle e, an is arrangedhorizontal] the said roller d normally contacting wit the roller a alongits whole len h in spite of-the obliquit of the latter, owing to thesaid inking ro er being formed of, or coated with, the usual resilientcomposition. The spindle e has its ends mounted in substantiallyhorizontal slots f in the framing f. g is the lprinting cylindercarrying the type to be in ed b the roller 11 and which is mounted onthe orizontal spindle h. 7', j are the cams secured to the said spindleh and revolving therewith and k, k are the bell-crank levers in a slot lin one end of each of which one end of the spindle e engages, and eachof which levers is pivoted at m and carries at its other end the rollern against which a cam j bears to bring the inking roller d but ofcontact with the roller a and into contact with the printing cylinder 9.dq is a spring provided for returning the sai roller d to its normalposition into contact with the roller a.

The operation of the device is as follows The roller d is normally heldby the spring q in frictional contact with the roller a, as shown b thedotted lines in Figures 1 and 2. As t e cylinder 9 rotates, the cams j,j depress the bell-crank levers k, Is thereby moving the inking roller dout of contact with the roller (1 and into contact with the printingcylinder g. This contact is maintained until the bearing surface of thecam j is rotated out of contact with the said lever is when the roller dis automatically returned to its normal position by the sprm g.

Cla lmsz 1. An inking device for the printing cylinder of a printingmachine, comprising an inking roller having a resilient surface, anink-duct roller arranged obliquely to the inking roller, an ink duct forthe ink-duct roller and means for moving the inking roller to and frobetween the ink-duct roller and the printing cylinder to make contactalternately with the said roller and cylinder.

2. An inking device as claimed in claim 1, wherein the means for movingthe inkin roller to and fro, comprise cams co-axia and rotatable withthe printing cylinder, and bell-crank levers co-acting at one end withthe cams and carrying at the other end the spindle. of the inkingroller.

3. An inking device for the printing cylinder of a printing machine,comprising an inking roller, an ink-duct roller arranged obliquely tothe inking roller, an ink duct for the ink-duct roller and means formovin the inking roller to and fro between the in -duct roller and theprinting cylinder to make contact alternately with the said roller andcylinder.

HORACE DRUMMOND BLACK.

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